AN INVESTIGATION OF TRAFFIC BEHAVIOR AT SIGNALS WITH RED, YELLOW AND GREEN ARROWS

The 1971 edition of the Manual on Uniform Traffic Control Devices provides for red arrow, yellow arrow and green arrow indications in traffic signals. Arrows are expected to be helpful when a turning movement must be protected from conflicting movements or when movements on an approach do not begin or end at the same time. Traffic behavior at a traffic signal with red, yellow and green arrow right turn controls was studied. Initial response was unacceptable, with 20% of all turns being made against a red arrow. Various experimental modifications to the installation were made, and violations were reduced to 7.6% of all turns. Horizontally separating the turn signal head from the head for through traffic, and supplemental signing were found beneficial. A limited study of traffic operations at an intersection with a green and a yellow arrow right turn signal (but no red arrow) was also made. Violations (violations on a through only arrow) were 16% of the total turning volume.

  • Supplemental Notes:
    • Sponsored by the Federal Highway Administration, Washington, D.C.
  • Corporate Authors:

    District of Columbia Department of Transportation

    55 M Street, SE
    Washington, DC  USA  20003
  • Authors:
    • KRAFT, M A
    • Van Vechten, C T
  • Publication Date: 1975

Media Info

  • Features: Figures; Photos; Tables;
  • Pagination: 49 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00132067
  • Record Type: Publication
  • Source Agency: Highway Safety Research Institute
  • Report/Paper Numbers: Final Rpt.
  • Contract Numbers: PR-1-626
  • Files: TRIS, STATEDOT
  • Created Date: Oct 13 1977 12:00AM